Amazon API 网关：当通过 Postman 调用 API 时，响应 body 没有转换？

Question

通过 AWS API 网关控制台执行测试时，我看到 Lambda 函数的输出响应已正确转换：

{
  "type" : "",
  "message" : "",
  "request-id" : ""
}

查看下面的日志：

Tue Sep 06 14:46:06 UTC 2016 : Endpoint request body after transformations: {}
Tue Sep 06 14:46:06 UTC 2016 : Endpoint response body before transformations: {"errorMessage":"501stef"}
Tue Sep 06 14:46:06 UTC 2016 : Endpoint response headers: {x-amzn-Remapped-Content-Length=0, x-amzn-RequestId=a4540f42-7440-11e6-90ce-214b29fcde38, Connection=keep-alive, Content-Length=26, Date=Tue, 06 Sep 2016 14:46:06 GMT, Content-Type=application/json}
Tue Sep 06 14:46:06 UTC 2016 : Method response body after transformations: {
  "type" : "",
  "message" : "",
  "request-id" : ""
}
Tue Sep 06 14:46:06 UTC 2016 : Method response headers: {Content-Type=application/json}
Tue Sep 06 14:46:06 UTC 2016 : Successfully completed execution
Tue Sep 06 14:46:06 UTC 2016 : Method completed with status: 501

然而，当通过 Postman 使用 headers 调用 API 时：

Content-Type : application/json
Accept : application/json

没有发生输出转换，输出 JSON 消息只是：

{
  "errorMessage": "501stef"
}

与部分相关，但本文讨论的是 Request。

Answer 1

API 网关控制台上的测试调用与使用 API 网关的实际调用之间的区别是测试调用始终假设 content-type 是 "application/json" 并接受 "application/json"。当您通过 Postman 调用时，您可能希望通过 header accept 传递 "application/json"。

Answer 2

在外部可见更改之前，您需要部署 API !

Amazon API 网关：当通过 Postman 调用 API 时，响应 body 没有转换？

Amazon API Gateway : response body is not transformed when the API is called via Postman?

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